1. Adda, Y., Beyeler, M., Kirianenko, A., and Maurice, F., (1961), Memo. Scient. Rev. Metal, 58, 716
2. Andersen, C. A., (1969), Proceedings of the Fourth National Conference of Microprobe Society of America Pasadena
3. Barrington, A. E., Herzog, R. K., and Poschenrieder, W. P., (1966), Prog. in nucl. Energy: Ser. 9, Analytical Chemistry, 7, 243
4. Beaman, D. R., and Isasi, J. A., (1970), Analyt. Chem., 39, 859
5. Beaman, D. R., and Isasi, J. A., (1972), Electron Beam Microanalysis, ASTM Special Publication no. 506, ASTM, Philadelphia, Pa.